textproduct: Quad Cities

KEY MESSAGES

- Unseasonably mild fall weather continues through the end of the week with passing clouds and relatively light winds.

- Mostly dry conditions expected for the beginning of the week with chances gradually increasing midweek and into the weekend.

SHORT TERM /THROUGH TUESDAY/

Issued at 1242 AM CDT Mon Oct 26 2026

A Canadian high pressure nudges a weak boundary southward to the Highway 34 corridor today as easterly flow sets in across much of the CWA. Highs will be slightly cooler in the 60s for areas north of Highway 34 but remain warmer in the low-to- mid-70s further south. After sunset, a subtle shortwave lifts into the Northern Plains, dragging a low pressure system with it across northwestern Iowa and southern Minnesota. This will pull the boundary near the Highway 34 corridor northward into Wisconsin on Tuesday with southerly flow returning. Highs once again climb into the low-to-mid-70s areawide. There is a small chance for spotty rain showers along the I-380 and Highway 20 corridors in Iowa late tonight into Tuesday, but dry air in the low levels should limit coverage (less than 10%).

LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/

Issued at 1242 AM CDT Mon Oct 26 2026

Tuesday Night-Thursday...Another shortwave trough swings into North Dakota and south-central Canada. As today's low pressure occludes, a secondary low pressure forms over the Dakotas and follows the trough into Canada on Wednesday. A cold front will lag behind the new low and move into northern Iowa Wednesday night before stalling over our CWA on Thursday with zonal flow aloft. Moisture from the tropical Pacific could support scattered PoPs (30-60%) ahead of and along this stalling front.

Friday-Sunday...The end of the week appears to be a similar set-up to today with the region sandwiched between a low pressure over the Central Plains and a high pressure over the Great Lakes. This will support southeasterly flow across the CWA with a weak warm front along the confluence zone. Continued advection of Pacific moisture keeps PoPs (30-50% coverage) around Friday through Saturday night. On Sunday, the longwave trough over the western CONUS is likely to eject eastward into the Northern Rockies, paving the way for a more active pattern heading into the first week of November.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 606 AM CDT Mon Oct 26 2026

A weak front has slowly dropped south of Interstate 80 overnight, and will stall over southeast Iowa today. Light and variable winds will gradually become more easterly over southeast Iowa and Illinois, while farther north, stronger east to northeast flow is already established and will continue and even strengthen later tonight with some gusts possible. VFR conditions in high cloud cover are mainly expected, but I do see some low stratus arriving in northern Illinois with the east/northeast winds off Lake Michigan, this has the potential to bring IFR stratus to DBQ this morning, and has been added as a temporary condition, while farther west and south, a scattered 1kft layer has been added to the TAFs for this issuance this morning.

Daytime mixing and winds turning more southeast with time should help the stratus lift north of the area later today if it moves in.

DVN WATCHES/WARNINGS/ADVISORIES

IA...None. IL...None. MO...None.